- Csi
- Cub
- Cubic root
- Cubicle
- Cultural
- Culture
- Cultured
- Cultured person
- Cumin
- Cumin seed
- Cumminseed
- Cumulative
- Cuneiform
- Cuniform writing
- Cunning fellow
- Cunningness
- Cupboard love
- Cutlet
- Cuppa
- Currently
- Curricle
- Curriculum
- Currier
- Curry-leaf tree
- Cursing
- Cursive
- Cursoriness
- Curt
- Curtail
- Curtly
- Curvaceous
- Curvature
- Cut ones own throat
- Cut out the middleman
- Cut short
- Cutie
- Cutlery
- Cutters
- Cutting
- Cuttings
- Cyan
- Cybele
- Cyber
- Cyber directory
- Cyberbullying
- Cybernetics
- Cycad
- Cycling
- Chivalrous
- Conjunctivitis
- Conjuncture
- Consolatory
- Cornflakes
- Cotillion
- Cotillon
- Chafer
- Cabaret
- Caiman
- Cairn
- Cajolery
- Cake
- Cakewalk
- Calamity
- Calculable
- Calculate
- Calculated insult
- Calculating
- Calculator
- Calculus
- Callously
- Callow
- Calorescence
- Calorie
- Caltrop
- Calumniate
- Calve
- Calx of brass
- Calyx
- Camaraderie
- Came
- Camel
- Camera
- Canister
- Canker
- Canned goods
- Cannery
- Cannibalism
- Canny
- Canonistic
- Canons
- Canoodle
- Cantaloupe
- Cantankerousness
- Canteen
- Canter
- Canthus
- Capnocytophaga
- Cappuccino
- Capricious
- Capricorn